/*
 * Copyright (C) 2012 The Guava Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.common.base;

import com.google.caliper.Benchmark;
import com.google.caliper.Param;

/**
 * Some microbenchmarks for the {@link MoreObjects.ToStringHelper} class.
 *
 * @author Osvaldo Doederlein
 */
public class ToStringHelperBenchmark {

    @Param({"0", "2", "5", "10"})
    int dataSize;
    private static final String NAME = "abcdefgh";
    private static final String NAME3 = Strings.repeat(NAME, 3);

    private static void addEntries(MoreObjects.ToStringHelper helper) {
        helper.add(NAME, 10).addValue(10L).add(NAME, 3.14f).addValue(3.14d).add(NAME3, false).add(NAME3, NAME3)
                .add(NAME3, 'x');
    }

    @Benchmark
    int toString(int reps) {
        int dummy = 0;
        for (int i = 0; i < reps; i++) {
            MoreObjects.ToStringHelper helper = MoreObjects.toStringHelper("klass").omitNullValues();
            for (int j = 0; j < dataSize; ++j) {
                addEntries(helper);
            }
            dummy ^= helper.toString().hashCode();
        }
        return dummy;
    }
}
